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ISP811S- INSTRUMENTS PHYSICS - 2ND Opp - JULY 2022 |
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NAMIBIA UNIVERSITY
OF SCIENCE AND TECHNOLOGY
FACULTY OF HEALTH, APPLIED SCIENCES AND NATURAL RESOURCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
QUALIFICATION : BACHELOR OF SCIENCE HONOURS
QUALIFICATION CODE: O8BOSH
COURSE CODE: ISP811S
LEVEL: 8
euvaes E NAME : INSTR:UMENTATIO:N
SESSION: JULY 2022
DURATION: 3 HOURS
PAPER: THEORY
MARKS: 100
SUPPLEMENTARY/SECOND OPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER
Prof Dipti R Sahu
MOpERATOR: | Pr Zivayi Chiguvare
INSTRUCTIONS
1. Answer all questions.
2. Write clearly and neatly.
3. Number the answers clearly.
PERMISSIBLE MATERIALS
Non-programmable Calculators
THIS QUESTION PAPER CONSISTS OF 2 PAGES (Including this front cover)
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Question 1
[20]
1.1
What are the basic control actions in process control?
(5)
1.2 Name five different sets of test inputs that can be given to a process.
(5)
1.3
Draw wave form of PID action and explain
(10)
Question 2
,
[20]
2.1
In the schematic DTA sequence of hydrated material having reversible and
irreversible changes, explain the steps occurs first on heating?
(5)
2.2
How is band gap calculated from UV Vis reflectance spectra?
(5)
2.3
Explain the Beer-Lambert Law. Why are deviations from Beer’s law more
common in IR spectroscopy than in UV-Vis spectroscopy?
(10)
Question 3
[20]
3.1
What is the source of the problem in any instrument and how one can overcome (5)
it?
3.2
What is X-ray diffraction? What types of measurement are typically made using (5)
XRD?
3.3
How are X-ray area detector data analysed? What is involved in calibrating an (10)
XRD instrument with an area detector?
Question 4
[20]
4.1
Which is better the electron microscope or optical microscope? Why?
(5)
4.2
What are Backscattered Electrons and what information can be get from BSE
images?
(5)
4.3
How does AFM work and What kind of samples can be analysed by AFM?
(10)
Question 5
_ [20]
5.1
Give example of displacement measuring Mechanical, electrical, photelectric and
optical instruments and explain its briefly?
(5)
5.2
Which instruments measures magnetism and how?
(5)
5.3
Why is the 4-probe method used for measurement of resistivity? Explain with
diagram
(10)